Alcohol for Operating Engines

Official Tests of Internal Combustion Engines on Alcohol Fuel

Shooting Oil Wells

The Development of Armored War Vessels.—XII

Armor Plating the United States

Dust Prevention in the Grinding Trades

Some Improved Methods

Timber and its Protection from Marine Enemies

The Forging of Alloy Steels

The Metallurgy of the Newer Alloys

The Injurious Effects of Light upon the Eye

The French Captive War Balloon

Its use at Casablanca

Freezing of Wells

How Fresh-Water Fish Care for Eggs

An Interesting Biological Study

The Mechanism of the Monsoon

The Work of a mighty wind

The Bororó Indians of Matto Grosso

A Strange Aboriginal Tribe of Brazil

Engineering Notes